package cn.com.dealme.filter;

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletResponse;

public class CacheFilter implements Filter {

	public void destroy() {
		
	}

	public void doFilter(ServletRequest req, ServletResponse resp,
			FilterChain chain) throws IOException, ServletException {
		((HttpServletResponse) resp).setHeader("Cache-Control", "no-cache");
		((HttpServletResponse) resp).setHeader("Pragma", "no-cache");
		((HttpServletResponse) resp).setDateHeader ("Expires", -1);
		chain.doFilter(req, resp);
	}

	public void init(FilterConfig arg0) throws ServletException {
		
	}

}
